International Journal of Plant Protection

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Population Dynamics of Aphis gossypii Glover on Coriander in Relation to Biotic and Abiotic Factors


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1 Department of Entomology, B.A. College of Agriculture, Anand Agricultural University, Anand (Gujarat), India
     

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Field experiment was conducted on population dynamics of Aphis gossypii Glover on coriander (Gujarat coriander 2) in relation to biotic and abiotic factors during winter season of 2011-12 and 2012-13. Incidence of aphid on coriander started from 3rd week of December (51st SMW) and continued till 1st week of March (10th SMW) with a peak level during 5th week of January (5th SMW). Minimum and mean temperature had highly significant negative association with aphid incidence during first year, whereas nonsignificant negative correlation with the pest activity during second year. The morning vapour pressure had significant negative relationship with A. gossypii during first year and non-significant negative association during second year. Remaining all the tested meteorological parameters showed non-significant relationship with aphid population on coriander crop during both the years. The biotic factors, viz., coccinellids and syrphids as well as their cumulative numbers showed highly significant positive correlation with aphid population during both the years.

Keywords

Aphis gossypii, Population Dynamics, Biotic-Abiotic Factors, Coriander.
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  • Population Dynamics of Aphis gossypii Glover on Coriander in Relation to Biotic and Abiotic Factors

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Authors

Aheibam Ranila
Department of Entomology, B.A. College of Agriculture, Anand Agricultural University, Anand (Gujarat), India
M. K. Kanani
Department of Entomology, B.A. College of Agriculture, Anand Agricultural University, Anand (Gujarat), India
J. B. Bhut
Department of Entomology, B.A. College of Agriculture, Anand Agricultural University, Anand (Gujarat), India
P. K. Borad
Department of Entomology, B.A. College of Agriculture, Anand Agricultural University, Anand (Gujarat), India

Abstract


Field experiment was conducted on population dynamics of Aphis gossypii Glover on coriander (Gujarat coriander 2) in relation to biotic and abiotic factors during winter season of 2011-12 and 2012-13. Incidence of aphid on coriander started from 3rd week of December (51st SMW) and continued till 1st week of March (10th SMW) with a peak level during 5th week of January (5th SMW). Minimum and mean temperature had highly significant negative association with aphid incidence during first year, whereas nonsignificant negative correlation with the pest activity during second year. The morning vapour pressure had significant negative relationship with A. gossypii during first year and non-significant negative association during second year. Remaining all the tested meteorological parameters showed non-significant relationship with aphid population on coriander crop during both the years. The biotic factors, viz., coccinellids and syrphids as well as their cumulative numbers showed highly significant positive correlation with aphid population during both the years.

Keywords


Aphis gossypii, Population Dynamics, Biotic-Abiotic Factors, Coriander.

References